4FA
From PyroGuide
4FA (sometimes written FFFFA) is high performance black powder that has been corned and screened to show a particle size ranging between 12 and 20 mesh (GOEX standard). See Gunpowder Grades.
4FA (sometimes written FFFFA) is high performance black powder that has been corned and screened to show a particle size ranging between 12 and 20 mesh (GOEX standard). See Gunpowder Grades.